William h



(No Model.)

W. H. DOLMAN.

, FIRE PROOF SHUTTER. No. 302,714. Patented July 29, 1884.

WITNESSES: S r HWENTOR WWW ga na/rv W BY 772W ATTORNEYS.

n. PETERS, Fholo-Lilhugnplwl. Walhmgfon. a. c.

' UNrrnn STATES WILLIAM H. DoLMAN,

on NEW YORK, N. Y.

Fl RE-PROOF SHUTTER.

SPECIFICATION forming part of Letters Patent No. 302,714, dated July 29,1884. Application filed September 26, 1883. No model.)

1'0 all whom, it may concern:

Be it known that I, WILLIAM H. DOLMAN, of the city, county, and State ofNew York, have invented a new and Improved Fire-Proof Window-Shutter, ofwhich the following is a full, clear, and exact description.

This invention relates to iron shutters; and it consists in theconstruction and arrangement of parts, as will be hereinafterfullydescribed, and specifically set forth in the claim.

Reference is to be had to the accompanying drawing, forming a part ofthis specification, in which the figure represents a sectionalelevation, showing the'passage through the shutter closed with a thinpiece of metal.

The shutter A is composed of the inner box portion, b, which may be castor made of sheetiron, and the outer sheet-iron plate, cl. These parts I)d have the coincident openings at 0 formed in them, and areboltedtogether by the bolts 0 e, to form a hollow shutter, as shown.

In the openings at c is fitted the pipe f, and the space between theparts I) d of the shutter is packed with ashes or other non-conductingmaterial, as shown at g. The pipe f will be fitted in the opening a, andthe non-conducting material 9 will be packed in the box part 5 beforethe plate d is bolted in place upon the edge of the part b. After theplate d has been bolted uponthe box part b, inelosing the non-conductingmaterial, with the outer end of the tube f reaching into the opening 0,the outer end of the said tube will be closed by the thin metal plate9', soldered or otherwise secured over the tube, as shown, which platecan be easily broken away in. case of fire. Constructed in this manner,it will be seen that the shutter, in case of fire in the building towhich it is applied, will endure any amount of heat upon the inside, andyet the outer surface of the shutter will remain cool, so that firemencan approach and stand close to it, and that by means of thepassage-tube f, the plate j being broken away, the nozzle of a hose maybe inserted and the fire fought with out the necessity of opening theshutter, which is always objectionable, as it produces a strong draftand increases the fire within.

My invention is also applicable to verticallyhinged and drop or hatchwaydoors.

I am aware that non-conducting material has been used between the platesof a shutter; also that observing-tubes have been inserted in doors; but

\Vhat I claim as new and of my invention A fire-proof shutter consistingof the box I), having a central aperture, and a front plate bolted tosaid box and provided with a simi lar aperture, a tube connecting theplate and box through their central apertures, and a thin piece ofmetal, j, secured over the aperture and adapted to be broken away, asset forth, the space between the box front plate and tube being filledwith non-conducting material, substantially as set forth.

WILLIAM H. DOLMAN.

Witnesses:

H. A. Wns'r, G. SEDGwIoK.

